But Jupiter can't find a moon big enough to protect it from meteor or comet impacts, like our moon protects Earth. Humanity recently has been alive and witnessed Jupiter getting smacked by a large comet. Jupiter's moons were powerless to absorb that impact.

Here's a picture of the side of the moon that always faces away from Earth that we never see (except from spacecraft going there) showing all the impacts that didn't reach Earth:

Literally this:

Our moon loves us and protects us, and we love our moon!